/*
 * Copyright (C) 2018 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.android.tools.idea.run.util

import org.jetbrains.annotations.TestOnly

object StopWatchTimeSource {
  private var myOverride: StopWatchTimeSourceOverride? = null

  val currentTimeMillis: Long
    get() = myOverride?.currentTimeMillis ?: (System.nanoTime() / 1_000_000)

  @TestOnly
  fun overrideDefault(timeSource: StopWatchTimeSourceOverride) {
    myOverride = timeSource
  }

  @TestOnly
  fun resetDefault() {
    myOverride = null
  }

  interface StopWatchTimeSourceOverride {
    val currentTimeMillis: Long
  }
}
